Statoil given green light for Maria modification plan
January 27, 2016
Wintershall’s Maria will be linked by subsea tieback to the Kristin, Heidrun and Asgard B platforms
Mid-December saw Norway’s Petroleum Safety Authority (PSA) give Statoil the green light for modifications at Kristin and Tyrihans, as part of a tie-in project with Wintershall-operated Maria oil and gas field. Maria is located in Production Licence (PL) 475 BS and PL 475 CS, at a depth of around 300 metres on the Halten Terrace in the Norwegian Sea.
Recoverable reserves at Maria were placed at around 180 million barrels of oil equivalent as of December 2014, with the project due on stream by the end of 2018. Wintershall operates the Maria licence with a 50% interest, while partners Petoro and Centrica Resources own 30% and 20% respectively.
The Maria reservoir will be linked via subsea tieback to the Kristin, Heidrun and Asgard B production platforms. Maria’s well stream will be transported to Kristin for processing, while receiving water injection into the reservoir from the Heidrun platform, and gas lift provided by Asgard B via the Tyrihans D field subsea template.
Processed oil will be sent to Asgard for storage and subsequent offloading to shuttle tankers, while gas will be exported via Asgard’s transport pipeline to the Karsto facility in Rogaland. The plan dates back to 2013, when Wintershall agreed with Statoil to use the Kristin platform for production at Maria in order to capitalise on advanced pre-existing infrastructure located in the area.
Statoil awarded a US$75.37 million contract to Reinertsen on March 23, under which the Norwegian supply firm will prepare Kristin for the Maria tie-ins. Kristin is a gas and condensate field located at Haltenbanken in PL 199 and PL 134 B of the Norwegian Sea.
Statoil holds a 55.29% operating interest at Kristin with partners Petoro (19.57%), Mobil (10.87%), Eni (8.25%) and Total (6%).
Tyrihans is located in PL 091 and PL 073, comprising a gas-capped oilfield named Tyrihans South, and a gas and condensate field with a thin oil zone named Tyrihans North. Tyrihans is already connected to installations at the Kristin and Asgard fields, with its well stream sent through a 43.6-km pipeline to Kristin, while gas is separately transported via the aforementioned Asgard pipeline to Karsto.
Statoil holds a 58.8% stake at Tyrihans with partners Total (23.1%), ExxonMobil (11.8%) and Eni (6.2%.).
The approval follows Wintershall’s awarding of a drilling contract at Maria to Odfjell Drilling. Issued in September, the agreement will see the company’s Deepsea Stavanger unit bore six wells on the Maria Field starting from April 2017, with the option for further well drilling.
The contract is worth US$175 million based on a 574-day budgeted campaign, and will see the drilling and completion of three production wells in each of Maria’s two subsea templates.